Fluorescent tube



FiG. 1 is a front view of a fluorescent tube showing my new design;

FiG. 2 is a left side view thereof;

FiG. 3 is a right side view thereof;

FiG. 4 is a rear view thereof;

FiG. 5 is a top view thereof; and,

FiG. 6 is a bottom view thereof. 

The ornamental design for a fluorescent tube, as shown and described. 